Hi, I just began working as a 1st AC on a feature film shot with two Red cameras (4K, using Ultra prime lenses). I arrived when the job was already in its 5th week, so I didn't do any kind of camera test in the rental house. It's my first time with Red cameras.
I read on the Red site that the camera sensor sizes are supposed to be a 24,4 x 13,7(or something close to that); this to obtain a frame size that is the same of S35 standards (an Arri ANSI gate exposed area is 24.9 x 18.7mm; I realize it's higher cause it's a 1.33 aspect ratio vs the Red's 1.77 HDTV cmos).
Looking through the viewfinder I noticed that the field of view of any lens I mount seems to be much shallower than it would be in a S35 or even 35mm camera's groundglass.
It seems that the effective sensor area you are exposing is much smaller than the "super 35mm" frame they claim...
I confirmed this to myself also by leaving, by mistake, a 50-65mm hard top on the lmb5 mattebox, in front of a 28mm lens; when I realized my error I took a look in the viewfinder and absolutely no vignetting was noticeable! (obviously no "focus check magnifying" was engaged). The edges of the matte were not even visible in the safe area outside the 2.40 format!
Has anybody done (or heard of) a close comparison between Red camera and super 35 camera effective field of view? Assuming that I am wrong and they are the same, isn't the "out of frame lines but still visible" area (in the standard 2.40 "Red" evf markings) itself already much wider than the correspondent area that would separate any S2.40 frame leader test side edges from the ANSI (24,9mm wide) side edges exposed through the film gate, next to the perforations?
Thank you for any answer!